Broaching machine |
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| 申请号 | US3599533D | 申请日 | 1969-06-27 | 公开(公告)号 | US3599533A | 公开(公告)日 | 1971-08-17 |
| 申请人 | LEAR SIEGLER INC; | 发明人 | ANTHONY RUSSELL W; | ||||
| 摘要 | A broaching machine having relatively reciprocable work and broach-supporting members comprising a pair of racks and pinions for effecting reciprocation of one member, a drive motor connected to a spline shaft, a pair of rigidly interconnected helical gears on said spline shaft, and gearing connecting each of said gears to one of said pinions so as to effect equal division of the load on each of said pinions. | ||||||
| 权利要求 | 1. A machine tool having a base, rectilinear guideways on said base, a slide mounted on said ways for reciprocation, a first motor carried by said base, a pair of racks on said slide parallel to said ways, a pair of pinions carried by said base in mesh with said racks, gearing interconnecting said motor and pinions, said gearing comprising a spline shaft, a pair of rigidly interconnected coaxial gears splined to said shaft and slidable longitudinally thereof, said gears and the splined connection thereof to said shaft including oppositely inclined helical torque-transmitting surface means arranged to provide for axial movement of said gears on said shaft into position such that substantially equal torque is transmitted through each of said gears, and separate gear trains connecting each of said gears to one of said pinions. 2. A machine tool as defined in claim 1 in which said rigidly interconnected gears are helical gears of opposite hand. 3. A machine tool as defined in claim 1 in which the splines connecting said rigidly interconnected gears to said spline shaft are helical. 4. A machine tool as defined in claim 1 in which said motor is an irreversible AC motor, clutch means for selectively coupling said motor to said gearing, and separate means independent of said motor for reversely actuating said gearing to move said slide in the opposite direction. 5. A machine tool as defined in claim 4 on which said separate means comprises a second motor. 6. A machine tool as defined in claim 1 in which said machine tool is a broaching machine, and in which said slide is moved by said first motor in a cutting stroke and by said second motor in an idle return stroke. 7. A machine tool as defined in claim 6 in which said guideways extend vertically on said base and said slide is a movable broach support. 8. A machine tool as defined in claim 7 comprising a work support post on said base having work locating and support means at its upper end. 9. A machine tool as defined in claim 8 comprising a generally tubular broach holder in said slide adapted to support an assembly of internal broach tools thereon movable over said post. 10. A machine tool as defined in claim 1 in which said rigidly interconnected gears are spur gears and in which the splined connection of the rigidly interconnected coaxial gears to the shaft comprises axially spaced splined sections of opposite hand. |
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